Event: Friendly Matches

PDF Excel

Opponent	Rating	Result
John Cox	77	0 - 1
Harry Batty	75	0 - 1
Yvonne S Taylor	0	1 - 0
Peter Wallace	104	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-136 = (256 + 400 * (1 - 3)) / 4)